Symfony2 - 如何使用带有Doctrine MongoDB ODM的postLoad事件监听器来更改文档？

Question

I have a document which describes a model in my app, I want to change a field value after the document is loaded, I figured out that the way to do it is with event listener. I added a new listener (postLoad listener) in my config/services.yml, I can't figure out how to get the document and change it before it is being sent.

help would be appreciated. :)

This is what I added to config/service.yml (under service)

core.listener:
  class: Matan\CoreBundle\EventListener\DocumentListener
  tags:
    - { name: doctrine_mongodb.odm.event_listener, event: postLoad }

DocumentListener.php

namespace Matan\CoreBundle\EventListener;

use Matan\CoreBundle\Document\App;

class DocumentListener
{
    public function postLoad()
    {
        //I Want to change it here
    }
}

Answer 1

solution:

You should specify the listener's method that shall be called in your service definition:

- { name: doctrine_mongodb.odm.event_listener, event: postLoad, method: onPostLoad }

Now you can get the document that has just been loaded from the EventArgs passed to the onPostLoad method.

check if it matches the model you want to change, then perform your changes.

use Doctrine\ODM\MongoDB\Event\LifecycleEventArgs;
use Acme\Your\Document\MyDocument;

public function onPostLoad(LifecycleEventArgs $eventArgs)
{   
    $document = $eventArgs->getDocument();

    if !($document instanceof MyDocument) {
       return;
    }

    // ... your code here
    // $document->setLoaded(new \Date('now'));
}